Will it rain in
Portland today?
Live hourly rain forecast and run verdict for Portland, Oregon, US.
Running in Portland means logging miles in the Pacific Northwest's persistent drizzle — and loving it. Whether it's a misty morning along the Willamette, rain-soaked trails in Forest Park, or a rare sunny day that brings the whole city outdoors, knowing whether to head out before you lace up matters. RainOrRun checks live conditions in Portland right now and gives you an instant verdict — plus the best hourly window if the weather's on the fence. We'll also recommend the right gear for whatever Portland's famously damp weather is throwing at you today.
What to wear
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How often does it rain in Portland?
Portland records around 1357mm of rain a year, spread across about 147 days — roughly 40% of all days, or 12 days in an average month. In practice that makes rain a regular feature of running in Portland rather than an exception — close to one day in two. A decent waterproof and a peaked cap earn their place in the kit bag year-round.
The wettest month is December, averaging 225mm across about 19 rainy days. The driest is July, with 8mm over roughly 2 days. Average lows in February drop to 1.9°C, cold enough that gloves, a headband and a thermal base layer make a real difference on early runs. At the other end, August averages 29.1°C highs — hot enough that early morning and evening are the sensible windows, and hydration matters more than waterproofing.
Those are ten-year averages, not a forecast. What actually matters on the day is the next twelve hours — which is what the live verdict and hourly strip at the top of this page are for.
| Month | Rainfall | Rainy days | Avg high | Avg low |
|---|---|---|---|---|
| January | 190mm | 19 | 8.1°C | 2.1°C |
| February | 149mm | 16 | 9°C | 1.9°C |
| March | 138mm | 17 | 12°C | 3.2°C |
| April | 113mm | 15 | 15.1°C | 5.4°C |
| May | 72mm | 11 | 19.6°C | 9.1°C |
| June | 57mm | 8 | 23.7°C | 11.9°C |
| July | 8mm | 2 | 28.6°C | 14.7°C |
| August | 14mm | 3 | 29.1°C | 15.2°C |
| September | 63mm | 8 | 23.9°C | 12.4°C |
| October | 137mm | 12 | 17.3°C | 8.4°C |
| November | 191mm | 17 | 10.9°C | 4.5°C |
| December | 225mm | 19 | 7.5°C | 2.2°C |
Historical data: Open-Meteo archive, 2015–2024. A “rainy day” means at least 1mm of precipitation.
Running in Portland: common questions
Will it rain in Portland today?
The forecast card at the top of this page shows Portland's rain probability for the current hour, plus an hour-by-hour breakdown for the rest of the day, using live Open-Meteo data. Historically, Portland sees rain on about 147 days a year, so on any given day there is roughly a 40% chance of some rain falling.
Is it a good day to run in Portland?
RainOrRun scores the live Portland forecast on rain probability, rainfall amount, temperature, wind speed and severe weather, then returns a single verdict: Go, Maybe, or Don't Bother. A Maybe means conditions are borderline and it is worth picking your window rather than skipping the run.
What is the best time to run in Portland today?
The hourly strip above highlights the best single window of the day for Portland — the hour combining the lowest rain probability with the most comfortable temperature. You can also check up to eight days ahead using the date picker if you are planning a long run or a race.
What should I wear running in Portland today?
The gear section on this page updates with the live Portland forecast: a waterproof jacket and peaked cap when rain probability goes above 40%, a thermal base layer and gloves below 8 degrees Celsius, and a high-vis vest when wind or low light make you harder to see.
What is the wettest month in Portland?
December is the wettest month in Portland, averaging 225mm of rain across about 19 rainy days. July is the driest, with around 8mm over roughly 2 days. Figures are ten-year averages covering 2015 to 2024.
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